Cartridge belt buckle



FIG. 1 is a perspective view of the cartridge belt buckle showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a rear view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for the cartridge belt buckle, as shown. 